Broaching machine



L; MYERS'.

BROACHNG MACHINE.

APPLICATION FILED SEPT. 2o. 1920.

Patented Dec. 5, 1922.

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BROACHING MACHINE. APPLICATION min SEPT. 20. 1920.

Patented Dec. 5, 1922.

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L. MYERS.

BROACHING MACHINE.

APPLICATION FILED SEPT. 2o. 1920.

PIIIQIIIQII Dee. 5, 192,2.

w s a m a W I Z a attowuf i cation,

Patented Dec. 5, 1922,

UNI-Eso `Is'la'flfs PATENT. OFFICE.

LOUIS MYERS, 0F IEHE'LEOI'I,I MICHIGAN.

' vin aoiicrnrre MAcHINE.

Application led September 20, 1920. Serial No.A 411,614.

To all whom t 'mayconcern.'v

Be it known thatl, Louis MYERS, a citizen 'of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented'certain new and useful Improvements in Broaching Mas ehines, of which the following is a specificompanying drawings. l v The invention relates to the. machining of work by the use of breaches, and it is the object ofthe invention to obtain' a machine .suitable mechanism in` which the entire operation upon the work maybe performed in a continuous cycle, and which, avoids the use of long breaching tools. `To thisend the'invention consists in the means for automatically lmanipulating a graduatedseries of -broaching tools to successively present the same inoperative relation tothe work to force each tool "through the work and to maintain the order of the series at the completion of the `cycle for a subsequent'operation on new work.

In the drawings.:l

Figure 1 is a front elevation of the maf,

chine;- 1- e Figure 2 is aside elevation in section; if

Figure 31s a plan view D Figure tis an elevation showlng. the conthereof partly 4struction of the indexing mechanism;

Figure 5 is a detail of the plunger show#4 'ing how the catches engage the breach.

A is a 'suitable frame provided with a table or bedl B upon which' the work, such as C, may be supported. D-is a press plunger arranged above the work table in a portion E of the frame and operated through suitable such` as\ the spring mechanism such as the pitman rod connection F, the-crank Gr, crank shaft H -gear Wheel L'pinion- J and drive wheel K, :the 4construction being similar to that of anordinary punch press. f 7 p Mounted above the table- .B andy between the same and the plunger D is a rotary member L. This is provided with a series of plungers M( which yby the rotation of said member L may be successively re istered' with the lunger'D and the work The plungers shdablyr engage. guide-wa s in the member Ljandare normally yiel ably held in raised'p'osition bits latch At the lower end of each plunger M is a' socket or recess 0 for the reception of a shankof a broaching tool P.- The plunger is also provided ltion of its passa reference being had therein to the acy work: is progressive throu drop Q2 havin zthe movement these members are .the medium of a link Y with a catch member O for retaining the broachin engagement with; its socket. l As shown, there is a pair ofthe catches O on diametrically opposite sides of the breach and each is provided with a tripping finger Oz'for releasing the broach atl the comple-v through the work.

Beneaththe ta le B is a-rotary carrier Q having a series of pockets Qf therein correspondin to the series of 1plungers M and breaches" The members erated lin unison and in registration by a such as the beve led gearfwheels R and said membersv with transversely-extending shafts S and S having ratchet wheels T and T o eratedl b pawls U and U from a reciproca ory rod ated by a crank W and pitman rod X from the shaft H. The timing of the mechanism just described is such that after each revolution of the crank shaft H, the ratchet- 7R', connecting each of.

at.. their outer 'ends sponding rotation of the members L and Q i to move one step in the series. The move- 'ment is also accomplished' during theupward movement ofthe plunger D, while duringthe'downwardmovement o said plunger the members Land Q remain stationary. A

With the mechanism as thus far described, it will be understood that the broachin tools P, which are carried by the plungers, are successively forcedth'rou h the work by the reciprocation of the p unger D. These broaching tools areV 'graduated so that the y performed thereby h'out the series. Each tool after being force through'the Work will be released by thejtripping of the fingers gage out of the socketO and into the pocket f 'of the member Q. Each pocket Q is provided at its lower end with a bottom member a finger Q8 outward t rough a slot Q4.

rotation of raised to lift the tools into re-engagement with the plungers M. This by suitable mechanism such which is connected at one end to the plunger D or other reciprocating part, while the opposite' end of said lever is connected through with ayertlcally movement 1s accomplished as the lever`;\ Y,

p v.. O2, which disen- A` the Icatches O', permitting the tool to d. u 10o projecting ra 1a y The members Q2 will support the tools during the intermittent the member Q, but at one point 1n 11de i j Y gear wheel, which is Y y when the catches O l tools have' been forced through the work.y

i one of the disengaementof reciprocatory member Y2. lThe member Y2 has at its lower end a finger Y3 -which engages with the fingers4 3 of the members Q2 and upon the upward movement of said member Y2 the member Q2 in engagement therewith will lift the tool P, re-engaging it with the plunger M in registration therewith. A further upward movement Y2 will cause the n er Yl thereon to engage with the linger lt projecting :from the plunger M and the plunger is thencarried upward until the latch N re-engages to hold it in itsraised position. The finger Y3 is disengaged from the finger Q3 after the re-engagement of the tool P with the plunger M, so as to permit the further upward movement of the rod Y2. rllhis disengagement maybe accomplished by a rotation of the rod Y2, which is eected by a cam slot Y5 therein engaging a stationary guide pin Y6( Y The complete operation of the machine is as follows: The work, such, for instance, as a to l have a key-way broached therein, is placed upon the table B and held in position by any suitable means (not shown) in proper registration with the actuated broach l). The broaching tools having been engaged with the catches ofthe plungers M, the mechanism is started. This will cause the reciprocaton of the plunger D forcing downward the registered plunger M and the tool P carried thereby, and pressing the latter completely through the hub of the gear wheel. The tool has a shank of reduced diameter, which will loosely fit the aperture in the hub of the work and therefore are released, the tool will of the socket O through the work and table' B and completely Within the pocket Q. During the upward movement of the plunger D, the rod Vr will be lifted by the crank W and pitman rod X, causing the pawls U' to simultaneously turn drop by gravity out the ratchet wheels T. This will effect a corofthe members L and Q,

responding rotation bringinfganother plunger M into registration with the plunger vD and another tool in reg` istration with the work.` Upon the succeed- 111g downward stroke of the plunger D the second plunger M and its tool will be forced downward and these operations will be performed in sequence until the entire series of Duringn each downward movement of the plunger D the lever Y willbe actuated to cause the upward movement of the rod Y2 and this, as previously explained, will lift bottom members Q2 and-the tool supported thereby to re-engage the latter with'the registering plunger M. Also, after the lfinger. Ys from the finger 2, the continued upward movement of the'member Y2 will lift the plunger M to its original position, where it is locked by the catch N.V Thus all of the tools will be of the member the tool, which the cycle, the tools are again in position forI a succeeding operation. The operating mechanism may be provided with any suitable trip (not shown), but such as is commonly used upon punch presses for arresting movement at the completion of the cycle, so v that the operator may then remove the finished work andinsert a new blank for a succeeding operation. i

Some of the advantages of my machine are; first, that in place of long broaching tools, which are expensive to makev and easily broken, there is substituted a series of short tools, which are cheaper and stronger; second, the work can be performed more expeditiously with my improved construction than` with constructions heretofore used; and third, the mechanism .is more compact and the space required less than where ,long

broaching tools are used.

What I claim as my invention is:

l. A broaching machine'or the like, coinprising a `series of graduated broaching tools, means for successively registering said tools with the work, means operating on each tool while in registration with the work for forcing the same through the work, and

means for returning the used tools through 9 a` different path to re-establish the original series. l

2. A broaching machine or the like, comprising la .series of graduatedl broaching tools, a work holder, a pair of carriers for the-toolsarranged pn opposite sides. of the work 1n said holder, means for intermittently moving said carriers to successively register the tools carried thereby with the work, means for forcing the tool in registration with the work from one carrier through the work into engagement with the other carrier, and means for returning said tool from the second carrier to Ytheplirst carrier when in position out of registration with the work.

3. A broaching machine or the like, comprising a series-of graduated broaching tools, a carrier for said tools, a Work holder, means for intermittently operating said carrier to successively register the tools with a reciprocating plunger for forcing the registered tool through the work, a carrier for receiving the tool after passage through the work, andmeans operating out of registration with the work for transferring the tool from the second carrier. l v

4. A broachingmachine or the like, comprising a work holder,'an endless carrier arranged at one side ofl-said work holder, a

`series of broaching tools engaged with said carrier and successively registered thereby with the work, a plunger in' registration withv is in registration with the the work,

carrier back to the original 50 carrier to successively register the vplung'ers work, a carrier for receiving the tool, means for operating said carriers in unison, and

transferring means for returning the tool from the second carrier to the first when out 'of registration with the work.

5. In'a breaching machine or the like, the' combination with a work-supporting bed or table, of. a rotary carrier arranged' thereabove, a series of reciprocatory plungers mounted in said carrier and successively registered thereby with the work, an actuating plunger in operative relation to the plunger of the series whichi's in registration withthe work, a seriesof graduated'broaching tools respectively detachably engaged with the plungers of the series, means for intermittently depressing the actuating plunger toforce the tool carried by the registering plunger through the work, means for releasing said tool from its carrying plunger at the completion of its' operation, a carrier beneath the work into which the tool is dropped when released, and means operating `upon said tool when out of registration with the work for returning the same from the second carrier to the first and for re-engaging it with the plunger.

6. In a'broaching machine or the like, the

combination with a Work holder, of a series of graduated broaching tools, reciprocatory plungers with which said tools are respectively detachably engaged, a carrier for said reciprocatory plungers, means for intermittently actuating said vcarrier to register the plungers and tools thereof with the work, an` actuating plunger for operative relation tothe plunger in registration with the work,

means for depressing said actuating plunger to Vforce the tool through the work, and releasing means automatically operatedat the completion of the movement, permitting said tool to disengage from the .plunger and -pass completely t roughV the work. y L 7. In a breaching machine or the like, the combination of a work holder, a series of `graduatedbroachingtools, reciprocatory plungers having sockets for the reception of the respective tools, a carrier for said'plungers, means for intermittently actuating said thereof andthe tools carried thereby with the work, a catch forretaining each tool in its plunger, an actuating plunger in operative relation to the plunger which is in regv -tingportion and a shank portion providing a clearance, means for actuating4 Said plunger to force the cutting portion of said tool completely through Vthe work, and means for releasing the tool from said plunger to permit the shank portion to drop through the work. i

9. In a broaching machine or the like,the. combination with areciprocatory plunger, of a work holder in alignment therewith, a breachingv tool carried by said plunger and having a cutting portion and a shank portion providing a clearance, means for actuating said plunger to force thecuttingportion of the tool completely through the work, means for automatically releasing the tool from the plunger to permit the shank plunger, of a work holder in alignment therewith, a broaching tool carried by said plunger having a cutting portion and a shank portion providing aclearance, a catch for holding said tool in engagement with the plunger, means for depressing the plunger to force the cutting portion cip the tool completely through the Work, and a trip for releasing said catch on the completion of the movement of the cutting portion of said toolv through the work to permit the shank 'portion thereof to drop through the work.

j 11. IIn a breaching machine orthe like,the combination with a reciprocatory plun er, of a work holder in alignment therewit a broaching tool having a cutting portion and a shank portion providing a clearance, a

. socket in said plunger for receiving the end ofthe shank portion of said tool, a catch for retaining the'tool in said socket, means for depressingthe plunger to force the cutting portion of the tool completely lthrough the -Work a trip for releasing said catch at thevcompletion of said movement to permit the shank portion of the tool to disengage from said plunger and drop through the work, anda receptacle beneath the work holder for.` receiving the tool.

12. In a breaching machine or the like, the combination With a .work hol-der, of a pair of carriers arranged on opposite sides thereof, a series of plungers mounted in one of said carriers vand adapted to'be successively registered with -saidwork holder, a series of pockets in the second carrier in registration With the plungers of said first carrier, a broaching tool for each plunge-'r having a cutting portion and a' shank portion providing a clearance, means for intermittently lforcing the cutting portion, of the tool the through the Work,ra catch for retaining apttool in engagement 'With the plunger a ed to be released upon the depression of the plunger permitting the shanklportion of the tool to drop through the Work and into the pocket of the second carrier, and means out,

of registration With the Work for transferring the tool from the pocket of the second carrier into re-engagement With the corresponding plunger of the first carrier.

13. In a breaching machine or the like, the combination with a work holder, of a rotary carrier arranged thereabove, a series of reciprocatory plungers mounted in said-carrier and adapted to be successively registered With the Work, a yieldable catch for holding said plungers in raised position, a breaching tool for each plunger having a cutting portion and a shank portion providing a clearance, means for depressing each plunger While in registration with the Work to force the cutting portion of the tool completely through the Work, a catch for retaining the tool in the plunger adapted to Matisse be released on the depression of said plunger, a carrier beneath said Work holder actuated in .registration with said first-mentioned carrier and having a series of pockets Which are successively registered with the Work and into Which the tools drop When released from their plungers, a movable bot'- tom member in each pocket, and means operating on said' bottom member when the pocket'is out of-registration with the Work -for raising the same and reengaging the tool with the plunger, and means for raising the plunger with the tool in engagement therewith into 'its initial engagement with the catc 14C. ln a breaching machine or the like, the combination With a plunger, of a Work holder in alignment therewith, a broaching tool detachably secured to said plunger and having a cutting portion and a notched shank portion, means for actuating said plunger to force the'cutting portionof the `tool through the Work, and means engage# able. with said notched shank for releasing the tool from the plunger after the cutting operation to permit the same to fall through the Work. y Q q ln testimony whereof l aiX my signature.

Louis- Mvnns.

position and into 

